[
  {
    "name": "국사",
    "url": "history/korean-history/pack.json",
    "levels": 10
  },
  {
    "name": "사자성어",
    "url": "korean/korean-idiom/pack.json",
    "levels": 10
  },
  {
    "name": "세계사",
    "url": "history/world-history/pack.json",
    "levels": 10
  },
  {
    "name": "속담",
    "url": "korean/korean-proverb/pack.json",
    "levels": 6
  },
  {
    "name": "수학 공식",
    "url": "math/math-formula/pack.json",
    "levels": 7
  },
  {
    "name": "영문법",
    "url": "language/english-grammar/pack.json",
    "levels": 10
  },
  {
    "name": "영어단어",
    "url": "language/english-word/pack.json",
    "levels": 6
  },
  {
    "name": "한자능력시험",
    "url": "language/hanja-grade/pack.json",
    "levels": 16
  },
  {
    "name": "화학식",
    "url": "science/science-core/pack.json",
    "levels": 10
  }
]